When I send my AI to my colleague, the colour appears to be different in her computer. And is not juz the appearance issue, the entire Hex code, RGB value and CMYK value were totally off. We both are using the same Adobe Illustrator CC.
Most Likely The hardware (monitors / laptops) are the main culprit. Always use the same screens to have an exact color reproduction. If the HEX or RGB are off. Try to use in on a plain page and print them out separately once from your device and once from the other. and see if there is a difference in color. MAKE SURE BOTH DEVICES HAVE THE SAME PRINTER PROFILES AND OUTPUT MODES.
Hope this helps.